Step 1: Make sure your temperatures and humidity are where they should be. Make sure your substrate is unlikely to cause an impaction (ball pythons seldom get impactions, but you don't want to create one).
Step 2: Feed your ball python an appropriate sized prey item every 5-7 days.
Step 3: Keep your husbandry up; clean enclosure, water, temps and humidity.

Ball pythons are fairly hardy, in the right environment in captivity they are very unlikely to have issues. Some species are difficult to keep even in the right environment, following the logic of "it is possible to do everything right and still have things go wrong, that is life." With ball pythons, aside from genetic disorders and prior husbandry ghosts, it tends to be very rare that doing everything right will have something go wrong.